What is the primary advantage of using capped safety fuse and Nonels?

• A. They are less expensive
• B. They are reliable in wet conditions
• C. They provide longer delay timing
• D. They are safer when electrical hazards are present

Answer: (D)

The primary advantage of using capped safety fuse and Nonels is that they are safer when electrical hazards are present. This is particularly relevant in mining and other explosive environments where electrical ignition sources must be minimized to ensure the safety of workers and the surrounding area.

Capped safety fuses are designed so that they do not create sparks that could ignite flammable materials, making them a much safer option in environments where electrical systems could pose a risk. Nonel, or non-electric detonators, further eliminate the risk of initiating an explosion through electrical means, as they do not rely on electric current to detonate. This feature is crucial when working in areas where electrical equipment may be in use, or moisture and water could come into contact with electrical systems, thus creating potential hazards.

While other options may present certain advantages, such as cost or reliability in specific conditions, the most significant benefit of using capped safety fuses and Nonels is their enhanced safety profile in environments where electrical hazards are a concern.